The zombie genre may be running on fumes at this point, but that hasn’t stopped the guys over at Doublesix from adding another game to the pile with this spiritual sequel to their 2009 arcade shooter “Burn Zombie Burn.” The developers’ latest offering, “All Zombies Must Die!,” is very similar in concept, but the addition of RPG-lite elements adds some much-needed depth to the overall experience. Instead of trying to earn the highest score by mowing down a seemingly never-ending horde of zombies, you’re now tasked with completing a series of quests as you attempt to survive the zombie apocalypse that’s overtaken the ill-fated town of Deadhill. Each of the four playable characters have a unique secondary attack that affects the zombies in a different way (like lighting them on fire or giving them radiation poisoning), but apart from that, they all handle the same.

Where “All Zombies Must Die!” really shows its depth, however, is in the ability to upgrade a character’s specific attributes (like attack, defense, health and speed) and create better weapons using a crafting system where you combine standard weaponry with items found throughout the map. Each item yields the same special ability no matter which weapon you pair it with (for example, firewood adds fire damage), but it plays a big part in preventing the game from getting stale too soon, even if the repetitive nature of the combat makes that an inevitability. Still, the game’s self-referential humor helps to keep things light and entertaining throughout, and it’s an absolute blast to play with a group of friends. Unfortunately, that also proves to be the game’s biggest shortcoming, because multiplayer co-op can only be played locally. The lack of an online mode isn’t the only thing standing in the way of Doublesix’s latest effort from reaching its full potential, but it’s certainly the most annoying.